CN206647279U - Air blast working equipment - Google Patents
Air blast working equipment Download PDFInfo
- Publication number
- CN206647279U CN206647279U CN201720219459.XU CN201720219459U CN206647279U CN 206647279 U CN206647279 U CN 206647279U CN 201720219459 U CN201720219459 U CN 201720219459U CN 206647279 U CN206647279 U CN 206647279U
- Authority
- CN
- China
- Prior art keywords
- air blast
- volute
- tongue
- impeller
- blast path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
Abstract
The utility model provide it is a kind of reduce in volute part because of the rotation of impeller and caused by noise air blast working equipment.In air blast working equipment (10), the relative position in the position gone out with the wind of impeller (24) in the main part (21) of volute part (20) forms tongue (21c), the tongue (21c) inversely extends from the position of the most upstream as air blast path (21a) and the flow direction of wind along air blast path (21a), make 2 times~3 times of the length at interval of the length on the direction along air blast path (21a) of tongue (21c) between multiple blade parts (24b) of impeller (24), and tongue (21c) is set to be tilted in a manner of the length in the axial direction in the rotation axis of impeller (24) (AX) shortens as upstream side aweather is gone.
Description
Technical field
The utility model is related to it is a kind of be applied in a manner of assembling fallen leaves etc. using the air sprayed from volute part it is clear
Sweep the air blast working equipment of operation.
Background technology
Patent Document 1 discloses a kind of air blast working equipment, the air blast working equipment includes being made for what dealer bore
Backrest, the volute part for being equipped on backrest, the impeller in a manner of it can rotate in the volute part and for rotating impeller
Engine.The volute part of the air blast working equipment has：Main part, the main part is on air blast road of the inner peripheral portion formed with volute
Footpath and the air blast path as volute central axis axial side front side formed with INO Intake Open oral area；And spray
Cylinder portion, it is so that internally continuously the state in the air blast path provided with volute is formed at the peripheral part of main part, for making from air inlet
The air of opening portion suction sprays.When the driving by engine makes impeller in volute part internal rotation, inhaled from INO Intake Open oral area
The air entered into main part is sprayed along centrifugal direction and the air blast path boosting through volute, is sprayed from cylinder portion is sprayed.Blowing
The top for going out the blast pipe that the air after a portion sprays is connected to ejection cylinder portion certainly sprays towards ground, so that in a big way
Fallen leaves that ground is scattered on the ground etc. gather together.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2002-257097 publications
Utility model content
Utility model will solve the problems, such as
In the air blast working equipment of patent document 1, noise caused by making the engine of impeller rotation is not only used for,
In volute part because of the rotation of impeller and caused by noise also turn into problem., it is known that produced in volute part because of the rotation of impeller
Noise be rotation impeller each blade part by the most upstream as air blast path in the main part of volute part
Position and air blast path downstream portion between tongue (representing in Fig. 4 (b) in the prior art) when pressure change institute
It is caused.Specifically, when the blade part of the impeller of rotation passes through tongue, on tongue periphery, pressure sharp rises, and is revolving
After the blade part of the impeller turned completes the action by tongue, on tongue periphery, pressure sharp declines, every in each blade part
It is secondary when passing through tongue, because the pressure on tongue periphery steeply rises repeatedly and drastically rises down and caused by sound wave turn into the rotation of impeller
One reason of caused noise.The purpose of this utility model is, in air blast working equipment, makes in volute part internal cause leaf
The rotation of wheel and caused lower noise.
The solution used to solve the problem
In order to solve the above problems, the utility model provides a kind of air blast working equipment, the feature of the air blast working equipment
It is, it includes：Volute part, the volute part have main part and spray cylinder portion, and the main part is in inner peripheral portion formed with volute
Air blast path and the air blast path of volute central axis axial at least side formed with INO Intake Open oral area, the ejection cylinder
Portion is formed at the peripheral part of main part, the ejection to be internally provided with the state in the continuous air blast path in air blast path of volute
Cylinder portion is used to spray the air from the suction of INO Intake Open oral area；Impeller, it has rotary plate and multiple blade parts, the rotation base
Plate has the rotation axis with the centerline axis parallel in the air blast path of volute and in a manner of it can rotate located at volute part
In main part, the plurality of blade part is in a manner of axially projecting along rotation axis located at rotary plate and with rotary plate
The mode at circumferentially spaced interval is configured, and the impeller is sprayed by the air after being sucked from INO Intake Open oral area along centrifugal direction,
So that boosted in the air blast path of volute of the air in main part and spray a portion certainly and spray；And prime mover, it is used
In rotating impeller, the relative position in the position that the wind with impeller in the main part of volute part goes out forms tongue, the tongue
Portion inversely extends from the position of the most upstream in the air blast path for turning into volute and the flow direction of wind along air blast path, makes tongue
2 times~the 3 of each interval of the length on the direction along the air blast path of volute in portion between multiple blade parts of impeller
Length again, and make tongue with the length in the axial direction of the central axis in the air blast path of volute as upstream side aweather is gone
And the mode to shorten tilts.
In the air blast working equipment formed as described above, due to the leaf of the impeller of the main part internal rotation in volute part
Piece portion is by the tongue that has tilted, therefore, when blade part passes through tongue, tongue circumferential pressure do not rise sharp and under
Drop, and 2~4 blade parts are all the time by tongue, therefore the variation of the pressure on tongue periphery can be reduced, so as to drop
It is low because of the rotation of impeller and caused by noise.In the air blast working equipment so formed, preferably following shape, i.e. make tongue
The length on the direction along air blast path in portion is the most long part in the axial direction of the rotation axis of impeller of tongue
More than 2 times of length, that is to say, that the length on the direction along the air blast path of the volute for making the tongue is
More than 2 times of the length of the most long part in the axial direction of the central axis in the air blast path of the volute of the tongue.
In the air blast working equipment formed as described above, it is preferred that the axle of the rotation axis in impeller of tongue
The half that upward most long part extends to the length in the axial direction of rotation axis of the blade part than impeller is long.I.e., it is described
The part most long in the axial direction of the central axis in the air blast path of the volute of tongue extends to the leaf for crossing the impeller
The center in the axial direction of the rotation axis in piece portion.
The effect of utility model
In the air blast working equipment formed as described above, due to the leaf of the impeller of the main part internal rotation in volute part
Piece portion is by the tongue that has tilted, therefore, when blade part passes through tongue, tongue circumferential pressure do not rise sharp and under
Drop, and 2~4 blade parts are all the time by tongue, therefore the variation of the pressure on tongue periphery can be reduced, so as to drop
It is low because of the rotation of impeller and caused by noise.
Brief description of the drawings
Fig. 1 is from the stereogram in terms of the rear ramp of backpack air blower of the present utility model.
Fig. 2 is the front view of volute part.
Fig. 3 be by the front side portion of volute part disassemble and it can be seen that internal stereogram.
Fig. 4 (a) is Fig. 2 A-A sectional views, and Fig. 4 (b) is the figure for the air blast working equipment for showing prior art.
Fig. 5 (a) and Fig. 5 (b) is the chart of the variation of the pressure on the periphery for recording tongue, wherein, Fig. 5 (a) is that record is existing
There is the chart of the variation of the pressure on the periphery of the tongue of technology, Fig. 5 (b) is the pressure on the periphery for recording tongue of the present utility model
Variation chart.
Description of reference numerals
10th, air blast working equipment；20th, volute part；21st, main part；22nd, cylinder portion is sprayed；24th, impeller；24a, rotary plate；
24b, blade part；25th, prime mover.
Embodiment
Hereinafter, with reference to the accompanying drawings of the backpack air blast of the embodiment as air blast working equipment of the present utility model
The embodiment of machine.As shown in figure 1, backpack air blower 10 includes being made for the backrest 11 that dealer bears, is equipped on backrest 11
Volute part 20, the impeller 24 in a manner of it can rotate in volute part 20 and prime mover for rotating impeller 24
25。
Backrest 11 is to be made for dealer to bear the component of volute part 20 and prime mover 25 to be carried.Backrest 11 include along
The backboard portion 12 and the base portion 13 that rearward extends from the lower end of backboard portion 12 of the back configuration of operator, backrest 11 from side
The shape that face is seen is in L-shaped.Volute part 20 is equipped with the position of the forward side of the base portion 13 of backrest 11.In volute part 20
Rear side is integratedly assembled with prime mover 25, and prime mover 25 is equipped on backrest 11 by volute part 20.
As shown in Figures 2 and 3, volute part 20 is included in the internal main part 21 for being provided with impeller 24 and is integratedly located at main body
The ejection cylinder portion 22 of the right side in portion 21.As shown in figure 3, the volute part 20 of the embodiment includes rear lateral portion 20a and front side portion
20b, the rear lateral portion 20a and front side portion 20b are assembled integrally with each other using screw element.In main part 21
Air blast path 21a of all portions formed with the volute centered on the central axis C extended along the longitudinal direction, before main part 21
Side is formed with the INO Intake Open oral area 21b for sucking air.The air blast path 21a of volute in main part 21 is formed as from right side
Pars intermedia on the above-below direction in portion starts in the inner peripheral portion of main part 21 to be seen counterclockwise as volute from front side
Mode gradually expands.INO Intake Open oral area 21b is formed at the central shaft of the whirlpool of the air blast path 21a as the volute of main part 21
Line C axial side, main part 21 front side.In the ejection cylinder portion 22 for being integrally formed in the right side of main part 21
Formed with air blast path 22a, the air blast path 22a in ejection cylinder portion 22 and the air blast path 21a of the volute of main part 21 continuously
Formed.Spray cylinder portion 22 to be connected and be connected with blast pipe 23, blast pipe 23 is utilized to ground from the air for spraying the ejection of cylinder portion 22
Face guides.
As shown in figure 3, impeller 24 is located in the main part 21 of volute part 20 in a manner of it can rotate, for making impeller 24
Prime mover 25 of rotation is assembled in the rear side of the main part 21 of volute part 20.Impeller 24 is to include the enclosed leaf such as lower member
Wheel：Circular rotary plate 24a, it has the central axis C with the air blast path 21a of the volute of the main part 21 of volute part 20
The coaxially rotation axis AX of (parallel)；Multiple blade part 24b, it is located at rotary plate 24a preceding surface；And in blade part
The side plate 24c for the annular that 24b front side is set.It is provided with rotary plate 24a preceding surface to the axle as rotation axis AX
To the prominent multiple blade part 24b in front side, the plurality of blade part 24b phases in rotary plate 24a direction of rotation (circumference)
Mutually configure at spaced intervals.Multiple blade part 24b both can be to configure at equal intervals, can not also be to configure at equal intervals.
Prime mover 25 uses the engine of internal combustion engine, and impeller 24 is consolidated in a manner of in the main part 21 for being projected into volute part 20
The drive shaft (omitting diagram) rotated due to the driving using prime mover 25.When driving prime mover 25, impeller 24 is in snail
The internal rotation of main part 21 of shape part 20.When impeller 24 is in volute 20 internal rotation of part, from the front side of the main part 21 of volute part 20
INO Intake Open oral area 21b suctions air in the presence of each blade part 24b of rotation from all portions of impeller 24 along centrifugal direction
Spray, air blast path 21a of the air after ejection through volute boosts and conveyed along the air blast path 22a for spraying cylinder portion 22, blowing
Go out the air after a portion 22 sprays earthward to spray via blast pipe 23.
As shown in Fig. 3 and Fig. 4 (a), in the main part 21 of volute part 20, in the most upstream as air blast path 21a
Tongue 21c is provided between position and air blast path 21a downstream portion, tongue 21c turns into the position of air blast path 21a most upstream certainly
Put and inversely extend with the flow direction of wind along air blast path 21a.Tongue 21c is formed at the position gone out with the wind of impeller 24
Relative position.The tongue 21c length on the direction along air blast path 21a forms the multiple blades that must be longer than impeller 24
Interval between portion 24b.Specifically, the tongue 21c length on the direction along air blast path 21a is multiple blade parts
2 times of the length at the interval between 24b, 2 blade part 24b of the impeller 24 of rotation must pass through tongue 21c simultaneously.Tongue
21c is with the upward length in front and back (length in the rotation axis AX of impeller 24 axial direction) along air blast path 21a's
The mode gone and shortened with upstream side aweather on direction tilts.Tongue 21c on the direction along air blast path 21a
Length is as length (the tongue 21c air blast path 21a in the volute central axis C axle on tongue 21c fore-and-aft direction
Upward length) most long part more than 2 times of length.In addition, make tongue 21c in the air blast path 21a of volute
Most long part extends to length of the blade part 24b in rotation axis AX axial direction than impeller 24 in mandrel line C axial direction
Half length position.Tongue 21c is integrally formed in the rear lateral portion 20a of volute part 20, and tongue 21c's prolongs in the longitudinal direction
Stretch most long part be connected to volute part 20 front side portion 20b inner peripheral surface.
Illustrate the action of backpack air blower 10 formed as described above.When driving prime mover 25, impeller 24 enters
Row rotation, each blade part 24b that the air sucked from the INO Intake Open oral area 21b of the front side of the main part 21 of volute part 20 is rotated
Sprayed from all portions of impeller 24 to centrifugal direction, the air blast path 21a boostings of air after ejection through volute and by spraying cylinder
Portion 22 conveys, and is earthward sprayed via blast pipe 23 from the air after cylinder portion 22 sprays is sprayed.When operator holds blast pipe
When 23 handle 23a makes the top end opening be rotated to the left and right in the front side of operator, make to be scattered to a wide range and fall leaves on the ground
Etc. gathering together.
In the backpack air blower 10, the position gone out with the wind of impeller 24 in the main part 21 of volute part 20
(all portions) relative position formed with tongue 21c, the most upstream as air blast path 21a of tongue 21c main bodies 21
Position and the flow direction of wind inversely extend along air blast path 21a.The tongue 21c direction along air blast path 21a
On each interval of the length between multiple blade part 24b of impeller 24 2 times of length, and make tongue 21c with fore-and-aft direction
On length (the tongue 21c length in the air blast path 21a of volute central axis C axial direction) with upstream aweather
The mode that side is gone and shortened tilts.
When rotating impeller in the main part of the volute part of conventional backpack air blower, as shown in Fig. 5 (a), in leaf
When the blade part of wheel passes through tongue, on tongue periphery, pressure sharp raising and lowering, continuously lead to every time in multiple blade parts
When crossing tongue, produced on the periphery of tongue because of the pressure sharp noise caused by sound wave caused by raising and lowering repeatedly.
On the other hand, revolve impeller 24 in the main part 21 of the volute part 20 of backpack air blower 10 of the present utility model
When turning, because tongue 21c is tilted in a manner of the upward length in front and back shortens as upstream side aweather is gone, therefore, such as
Shown in Fig. 5 (b), the blade part 24b of impeller 24 is elongated by tongue 21c time, and thus, on tongue 21c periphery, pressure is not
Can sharp raising and lowering (using single dotted broken line represent each blade part 24b by when pressure, profit is indicated by the solid line adjacent
Each blade part 24b by when pressure sum), can suppress tongue 21c periphery produce because pressure sharp rises repeatedly
With decline caused by noise caused by sound wave.
In addition, the length on the direction along air blast path 21a for making tongue 21c is multiple blade parts of impeller 24
2 times of interval between 24b.Therefore, 2 blade part 24b of the impeller 24 of rotation must be simultaneously by tongue 21c, in tongue
21c periphery, 1 blade part 24b by the pressure that declines afterwards and ensuing blade part 24b by when the pressure phase that rises
Superposition, thus enable that the minimum pressure on tongue 21c periphery rises.Thereby, it is possible to the maximum pressure on the periphery for making tongue 21c
Variation Δ P between minimum pressure is smaller, so as to suppress tongue 21c periphery produce because pressure repeatedly sharp on
Noise caused by liter and decline.In addition, the tongue 21c length on the direction along air blast path 21a is impeller 24
2 times of the length at each interval between multiple blade part 24b, but the utility model is not limited to this, tongue 21c along drum
As long as 2 times~3 times of the length at each interval of the length between multiple blade part 24b of impeller 24 on wind path footpath 21a direction
Degree, it becomes possible to suppress the production of noise on the premise of less reducing from impeller 24 along the output of the air blast path 21a wind sprayed
It is raw.In addition, when multiple blade part 24b of impeller 24 are circumferentially configured unequal interval, preferably between blade part 24b
The tongue 21c length on the direction along air blast path 21a is set on the basis of largest interval.
In the above-described embodiment, prime mover 25 by internal combustion engine motor mechanism into, but the utility model is not limited to this,
The electro-motor being driven by battery, external power source can also be used as prime mover 25, when being arranged such, can also obtained
Obtain action effect same as described above.
In addition, backpack air blower is illustrated as an embodiment of air blast working equipment, but the utility model is simultaneously
Not limited to this, apply also for the air blower of hand-held.
Claims (3)
1. a kind of air blast working equipment, the air blast working equipment is characterised by that it includes：
Volute part, the volute part have main part and spray cylinder portion, and the main part is in air blast path of the inner peripheral portion formed with volute
And the air blast path of the volute central axis axial at least side formed with INO Intake Open oral area, the ejection cylinder portion with
The peripheral part that the main part is formed at the state in the continuous air blast path in air blast path of the volute is internally provided with, should
Cylinder portion is sprayed to be used to spray the air from INO Intake Open oral area suction；
Impeller, it has rotary plate and multiple blade parts, and the rotary plate has the center with the air blast path of the volute
The rotation axis of diameter parallel is simultaneously located in the main part of the volute part in a manner of it can rotate, and the plurality of blade part is with edge
The axially projecting mode of the rotation axis located at the rotary plate and with the direction of rotation of the rotary plate every
The standard width of a room in an old-style house every mode configure, the impeller by will from the INO Intake Open oral area suction after air sprayed along centrifugal direction, so as to
Make to boost in the air blast path of volute of the air in the main part and sprayed from the ejection cylinder portion；And
Prime mover, it is used to rotate the impeller,
The relative position in the position gone out with the wind of the impeller in the main part of the volute part forms tongue, the tongue
Inversely prolong from the position of the most upstream in the air blast path as the volute and the flow direction of wind along the air blast path
Stretch,
The length on the direction along the air blast path of the volute for making the tongue is multiple blade parts of the impeller
Between each interval 2 times~3 times of length, and make the tongue with the axle of the central axis in the air blast path of the volute
The mode that upward length is gone and shortened with upstream side aweather tilts.
2. air blast working equipment according to claim 1, it is characterised in that
The length on the direction along the air blast path of the volute for making the tongue is the tongue in the volute
Air blast path central axis axial direction on more than 2 times of length of most long part.
3. air blast working equipment according to claim 1 or 2, it is characterised in that
The part most long in the axial direction of the central axis in the air blast path of the volute of the tongue extend to cross it is described
The center in the axial direction of the rotation axis of the blade part of impeller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-075363 | 2016-04-04 | ||
| JP2016075363A JP6727006B2 (en) | 2016-04-04 | 2016-04-04 | Blower work machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206647279U true CN206647279U (en) | 2017-11-17 |
Family
ID=58545359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720219459.XU Active CN206647279U (en) | 2016-04-04 | 2017-03-08 | Air blast working equipment |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6727006B2 (en) |
| CN (1) | CN206647279U (en) |
| DE (1) | DE202016007447U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081763A (en) * | 2019-06-14 | 2020-12-15 | 株式会社牧田 | Blower fan |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440316B (en) * | 2022-01-30 | 2024-02-27 | 广东美的暖通设备有限公司 | Air duct assembly and air conditioning equipment with same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6369800U (en) * | 1986-10-27 | 1988-05-11 | ||
| US6162016A (en) * | 1999-09-29 | 2000-12-19 | Visteon Global Technologies, Inc. | Centrifugal blower assembly |
| JP2002257097A (en) | 2001-03-05 | 2002-09-11 | Maruyama Mfg Co Ltd | Powered working machine |
| US20030039541A1 (en) * | 2001-08-20 | 2003-02-27 | Xerox Corporation | Blower noise reducing device and a blower having same |
| JP2011001838A (en) * | 2009-06-17 | 2011-01-06 | Panasonic Corp | Centrifugal blower and drying device including the same |
| JP6180879B2 (en) * | 2013-10-25 | 2017-08-16 | 株式会社マキタ | Back blower |
| JP6335625B2 (en) * | 2014-05-08 | 2018-05-30 | 株式会社マキタ | Powered work machine |
-
2016
- 2016-04-04 JP JP2016075363A patent/JP6727006B2/en active Active
- 2016-12-07 DE DE202016007447.5U patent/DE202016007447U1/en active Active
-
2017
- 2017-03-08 CN CN201720219459.XU patent/CN206647279U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081763A (en) * | 2019-06-14 | 2020-12-15 | 株式会社牧田 | Blower fan |
| US11771018B2 (en) | 2019-06-14 | 2023-10-03 | Makita Corporation | Blower |
| CN112081763B (en) * | 2019-06-14 | 2023-10-31 | 株式会社牧田 | Blower fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017186938A (en) | 2017-10-12 |
| JP6727006B2 (en) | 2020-07-22 |
| DE202016007447U1 (en) | 2017-03-27 |
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